1246632 九、發明說明： 【發明所屬之技術領域】 本發明係提供-種魏鏡頭，尤其係指—種具有遠景減及廣視角 拍攝功能，適用於手機、小型數位相機的尺寸超短的輕量化變焦綱。 【先前技術】 按’與傳脑械、攝f彡機及—般触滅的可雕、可變焦綱 不同’ X手機尺寸之限定’可触手機巾所之照相綱的尺寸要 小很多，結構亦簡單很多1多數均係定錄頭，其可拍攝之範圍尤 其疋退、近距離拍攝有-定限制，無法像傳統肋機那樣通過調焦、 變焦而獲取最佳拍攝效果。如巾國實用新型專利第㈣2836. 5、 01273098.X、〇221_·8、〇麵n.5號以及美國專利公告第 6, 650,486、6, 741，405號均公開了 一種適用於可拍照手機的定焦鏡頭 結構。 & ffij Ptt it訊技術之發展’人情手機拍攝影像的品f要求越來越 冋’雖然近年來藉由改進可拍照手機中所使用的CCD (咖哪⑺叩— • 感光輕合元件）、CMOS ( Complementary Metal-Oxide Senuconductor ’互補性氧化金屬半導體）等影像感測元件技術，使可 拍照手機拍攝之影像晝質從1〇萬像素、35萬像素提高13〇萬像素甚至 200萬像素的水平’但由於可減手酬制之綱鮮均爲定焦鏡 頭’其焦距固定’鏡頭的視角就固定，當要拍攝局部範圍景物時必須 要移動拍攝距離’烟上十分不便，而若制數位變焦又會降低影像 Ά因此採用具有光學變焦功能的鏡頭仍是現今可拍照手機的 1246632 首選。 目前業界不乏小型化變焦鏡頭之設計方帛，例如日本佳能⑹職) 公司獲准公告於2001年2月20日的美國專利第6,⑼，_號及公告 於2001年5月15日的美國專利第6,233，_號，揭示了 一種具有負、 正、正及正屈光度的四透鏡組之變焦鏡頭，通過改變第一、二及二透 鏡組之間的距離而剌遠、近鋪拍攝之焦距調整。同樣是由佳能公 司申請的公開於2003年2月5日的中國發明專利公開第⑽漏碰 號，亦揭示了-種微型化之變焦鏡頭，其從物方到像方依次包括一負 屈光度的第-透餘、—正屈光度的第二透鏡組及位制定的第三透 鏡組，藉由改縣-透鏡組與第二透餘之關距離達到變焦效果。 惟’前述習知魏辆在—般拍驗態向遠錢視角拍攝狀態轉 換’或由遠視角向近視鱗換時，整個鏡頭之Μ尺寸將隨著拍攝狀 匕之變化而改變’聰整體尺寸在使财纽變的懸、綱，對於厚 尺寸僅20刪的手機顯然是不適合的，一是難以裝入手機機餅中， 二是手機攜帶和使用時常會有雜、補等情形，鏡頭尺寸的改變很 容易使鏡頭意外受損。而且，前述f知變焦鏡頭所伽之鏡片至少也 有六片以上，除成本增純外，其重量較大亦是困擾之一。 ⑼另據稱，飛利浦（Philips)公司研究開發出一種適於手機使用的 微！化液體鏡頭，其係將雜互不她且財㈣騎麵液體注入 「透明的柱狀容ϋ中，藉由施加電壓來改變容器中兩種液體之極性， 、、表面張力的變化來改魏體的介㈣態，從而制偏折光線的目 1246632 的，並通過改變Μ來進行織。惟這種産品在使料程的穩定性、 成像品質以及使用壽命等指數仍有待進_步測試，短期内要進行大規 模量産及使用仍有相當大的難度。 因此，研究開發-種適合於可顧手機使用的，具有遠景拍攝及廣 視角拍攝功能且尺寸短小的輕量化光學變焦鏡頭，仍是業界所面臨的 一項迫切的現實技術需求。 【發明内容】 本發明之目的在於提供一種尺寸超短、鏡片數目少且結構緊湊，具 有遠景拍攝及廣視角拍攝功能，且光學成像性能優良的變焦鏡頭。 依據本發明之目的而提供之變焦鏡頭，其從物方到像方依次包括負 屈光度之第一透鏡組、正屈光度之第二透鏡組及正屈光度之第三透鏡 組，其中用於收光之第一透鏡組位置固定，用於變焦的第二透鏡組及 提供補償的第三透鏡組可移動，改變第二透鏡組與第一透鏡組之間的 距離而使整個鏡頭之焦距變化，並藉第三透鏡組位置之改變而補償變 焦後造成的成像面移動，使成像面之位置始終保持固定不變。 依據本發明之目的所提供之變焦鏡頭，其滿足如下關係式·· fbw 〇.27<- <0.35 (a-1)1246632 IX. Description of the invention: [Technical field of the invention] The present invention provides a kind of Wei lens, in particular, a feature that has a long-range reduction and wide viewing angle shooting function, and is suitable for mobile phones and small digital cameras. Zoom outline. [Prior Art] According to 'the difference between the engraving and the zooming and the zooming, the X-size of the mobile phone, the size of the camera can be touched by the size of the camera. It is also simple. Many of them are fixed-head recordings. The range of possible shooting is particularly backward, and there is a limit for close-up shooting. It is impossible to achieve the best shooting results by focusing and zooming like traditional ribs. For example, the towel utility model patents (4) 2836. 5, 01273098.X, 〇221_·8, 〇面 n.5, and U.S. Patent Nos. 6,650, 486, 6, 741, 405 all disclose a suitable camera phone. Fixed focus lens structure. & ffij Ptt It's development of technology. 'The demand for mobile phone shooting images is getting more and more 冋'. Although in recent years, by improving the CCD used in camera phones (Cana (7) 叩 - • Photosensitive components), Image sensing component technology such as CMOS (Complementary Metal-Oxide Senuconductor 'complementary oxidized metal semiconductor) enables the image quality of camera-capable mobile phones to increase the level of image quality from 1 million pixels to 350,000 pixels by 130,000 pixels or even 2 million pixels. 'But since the standard of the hand-reducing system is fixed-focus lens 'the focal length is fixed', the angle of view of the lens is fixed. When shooting a local range of scenes, the shooting distance must be moved. 'The smoke is very inconvenient, and if the digital zoom is made, It will also reduce the image, so the lens with optical zoom is still the first choice for the 1246632 camera phone today. At present, there are many design methods for miniaturized zoom lenses in the industry, such as the Japanese Canon (6) position. The company was approved to publish US patents No. 6, (9), _ on February 20, 2001 and US patents announced on May 15, 2001. No. 6,233,_, discloses a zoom lens of a four-lens group with negative, positive, positive and positive refracting power, and adjusting the focal length of the far-and-close shot by changing the distance between the first, second and second lens groups . Also, the Chinese Invention Patent Disclosure (10), which was filed by Canon Inc., published on February 5, 2003, also discloses a miniaturized zoom lens that includes a negative diopter from the object side to the image side. The second lens group of the first-perforated, positive diopter and the third lens group defined by the position achieve the zooming effect by changing the distance between the county-lens group and the second venting. However, when the above-mentioned conventional Wei vehicle is in the state of shooting a state of view to the distant view, or when changing from a far angle to a near-sight scale, the size of the entire lens will change with the change of the shooting condition. In the case of making the financial dynasty, it is obviously not suitable for a mobile phone with a thick size of only 20, one is difficult to load into the mobile phone cake, and the other is that the mobile phone is often carried and used, and the lens size is often used. The change is easy to accidentally damage the lens. Moreover, the above-mentioned f-zoom lens has at least six lenses, and its weight is also one of the troubles in addition to cost enhancement. (9) It is also alleged that Philips has developed a micro for mobile phones! Liquid lens, which is used to inject impurities into the "transparent columnar volume", by changing the polarity of the two liquids in the container, and changing the surface tension. The medium (4) state of the body, which is made by deflecting the light of the head 1246632, and is woven by changing the enamel. However, the index of the stability, image quality and service life of the product is still to be tested. It is still quite difficult to mass-produce and use in a short period of time. Therefore, research and development--a lightweight optical zoom lens that is suitable for mobile phones and has a short-range shooting and wide-angle shooting function and has a short size is still An urgent need for real technology in the industry. SUMMARY OF THE INVENTION The object of the present invention is to provide a zoom that is ultra-short in size, small in number of lenses, compact in structure, capable of long-range shooting and wide-angle viewing, and excellent in optical imaging performance. A zoom lens according to the object of the present invention includes a first lens group of negative refracting power and a positive refracting power from the object side to the image side. a second lens group and a third lens group of positive refracting power, wherein the first lens group for receiving light is fixed in position, the second lens group for zooming and the third lens group providing compensation are movable, and the second lens group is changed The focal length of the entire lens is changed by the distance from the first lens group, and the movement of the imaging surface caused by the zoom is compensated by the change of the position of the third lens group, so that the position of the imaging surface is always fixed. The zoom lens provided for the purpose satisfies the following relationship: fbw 〇.27 <- <0.35 (a-1)
TT 其中’ fbW係廣角端的後焦長度(Back Focal Length at Wide Angle End)，TT 是光執迹總長度(Total Optical Track)。 依據本發明之目的所提供之變焦鏡頭，其中第二透鏡組與第三透鏡 組之間滿足下列關係式： 1246632 · t /2 h7<了 <2.9 (a—2)TT where ' fbW is the Back Focal Length at Wide Angle End, and TT is the Total Optical Track. A zoom lens according to the object of the present invention, wherein the following relationship is satisfied between the second lens group and the third lens group: 1246632 · t /2 h7 < 2.9 (a - 2)
Js 其中，f2係第二透鏡組之焦距，f3係第三透鏡組之焦距。 依據本發明之目的所提供之變焦鏡頭，其賴足刊關係式· °·16<~ <2-2 (a—3) 其中，Μ系成像圈之半徑(Radius of an Image Circie)，打係光 執迹總長度(Total Optical Track)。 依據本發明之目的所提供之變焦鏡頭中，第二透鏡組包含一正屈光 度之變焦透鏡，該魏透鏡她物方—_表面及朝向像方_側的表 面均爲球面。 依據本發明之目的所提供之變焦鏡頭中，第三透鏡組包含一正透鏡 及一負透鏡，該正透鏡及該負透鏡各有至少一表面是非球面。 依據本發明之目的所提供之變焦鏡頭中，第一透鏡組包含一負屈光 度之收光透鏡，該收光透鏡之至少一表面是非球面。 依據本發明之目的所提供之變焦鏡頭中，前述非球面可由下列非球 面公式表達： 2 =_^-r + Ah4+Bh6+Ch8+m10 l + \l-{k + l)c2h2^ 與習知技術相比，本發明變焦鏡頭採用負、正、正三透鏡組結構， 並使第一透鏡組及成像面之位置固定不變，藉由改變正屈光度的第二 透鏡組之位置改變第一、二透鏡組間之距離，而達到變焦之效果，並 藉第三透鏡組補償因變焦而造成的像面移動’確保成像清晰。整個變 1246632 焦鏡頭之鏡片數目少，結構緊湊，尺寸甚至可縮減至9麵，而光學變焦 仍達到接近2倍，且在如此短的總長條件下仍具奴夠的後焦，而具 有優良之光學性能。另，藉由非球面鏡片之設置可以有效矮正像差而 確保影像品質良好。因此’本發明之變焦鏡頭符合大規模量產之要求， 具有良好的市場前景。 【實施方式】 請參閱第-騎示本發明之魏鏡_絲剖視輯，該變焦鏡頭 從物方到像方依次包括負屈光度之第—透鏡組丨、正屈光度之第二透鏡 組2及正屈光度之第三透鏡組3。其中，該第—透鏡組丨包含一負屈光 度的收光魏H)，魏紐賴彻麟射_成型，其被固定於 鏡頭的最前端用於收光。該收光透鏡1G係—非球面鏡片’即其至少— 表面爲非球面。在具體實施時，其朝向物方-側之第-表面U可採用 略微凸起之非球面，相對之第二表面12則係向物方凹陷之非球面，使 本發明變焦鏡頭在廣角狀態時視角可達65. 3度。 第二透鏡組2係用於改變鏡頭焦距，其包含-正屈光度之變焦透鏡 2〇，該變焦透鏡20採用玻璃材質，且其朝向物方一側的第一表面幻 及相對另-側之第二表面22均爲球面，藉此使本發明之變焦鏡頭的整 個光學系統的公差容忍度獲得大幅度提升。對於用於可拍照手機或超 短魏位相機的此類微型光學鏡頭而言，藉由内部透鏡之移動進行變 :疋U度的’具有大的公差容忍度是整個鏡頭絲系統能否 里産的重要關鍵要素之一。 1246632 第三透鏡組3係用以補償變焦所造成的成像面6位置的移動，確保 成像面6之位置始_林變，使變紐人射統仍可在固定位置的 成像面6上聚焦而獲得清晰影像。該第三透鏡組3自物方至像方依次 包含一正透鏡31及—貞透鏡32，該正透鏡31係-娜材質之模造非 球面鏡片，其朝向物方—侧的第—表面311及相對另—側的第二表面 312中至少有-表面爲非球面。同樣，負透鏡32亦係一塑膠材質之模 造非球面鏡片’其朝向物方_側的第一表面321及相對另一侧的第二 表面322中至乂有-表面爲非球面。該正透鏡&之焦距爲正值，以補 償第一透鏡組1與該負透鏡犯在不同溫度下所造成的後焦改變量，使 本發明鏡财不同溫度下亦可續得良㈣解像。此外該正透鏡 31還作爲場曲的補償如該正、負透鏡3卜32之非球面特性，可進 一步提南整個鏡頭之光學解像。 另，於該第二透鏡組2與第三透鏡組3之間設置有光鬧5以控制入 射光線量’在第三透鏡組3的貞透鏡32第二表面微鄰近位置設有平 蝴蓋板4 (或紅外濾鏡）。本發明變焦鏡頭之第一透鏡組工及成像 面6位置蚊，-健個铜之總長翻定，使铜舰裝配至手 一機構件中並減小在手機攜帶及使用過程中鏡頭被外力意外碰撞 她的風險。藉由移動第二透鏡組2改變其與第一透鏡組工間之距離 而進繼’瞻H施3姆猶_、錢成的成 像面6之鑛，即可由第—騎枚遠職攝狀_爲第二圖所示之 —般拍攝狀態，進哺爲第三_示之近5£_#_。 1246632 本發明變焦鏡頭所使用的鏡片數目少且結構緊湊，採用内部變焦方 式，其總體長度可縮減至9mm，在如此短的總長度條件下鏡頭仍有足夠 的後焦。爲此，本發明變焦鏡頭滿足如下關係式·· fbw 〇.27<-<0.35 (a-l)Js where f2 is the focal length of the second lens group and f3 is the focal length of the third lens group. The zoom lens provided according to the object of the present invention is based on the relational expression · ° · 16 < ~ < 2-2 (a - 3) wherein the radius of the imaging circle (Radius of an Image Circie) The total length of the light is (Total Optical Track). In the zoom lens provided in accordance with the purpose of the present invention, the second lens group includes a positive-powered zoom lens having a spherical surface on both the object side surface and the surface side of the image side. In the zoom lens according to the object of the present invention, the third lens group includes a positive lens and a negative lens, and each of the positive lens and the negative lens has an aspheric surface. In the zoom lens according to the object of the present invention, the first lens group includes a negative refracting light receiving lens, and at least one surface of the light receiving lens is aspherical. In the zoom lens provided in accordance with the purpose of the present invention, the aforementioned aspherical surface can be expressed by the following aspherical formula: 2 = _^-r + Ah4 + Bh6 + Ch8 + m10 l + \l - {k + l) c2h2^ Compared with the prior art, the zoom lens of the present invention adopts a negative, positive, and positive three lens group structure, and the positions of the first lens group and the imaging surface are fixed, and the position of the second lens group that changes the positive refractive power changes first, The distance between the two lens groups is used to achieve the effect of zooming, and the third lens group compensates for the image surface movement caused by the zoom to ensure the image is clear. The entire 1246632 focal lens has a small number of lenses, compact structure, and can even be reduced to 9 faces, while the optical zoom is still nearly 2 times, and under such short total length conditions, it still has enough back focus, and has excellent Optical performance. In addition, the arrangement of the aspherical lens can effectively correct short image aberrations and ensure good image quality. Therefore, the zoom lens of the present invention meets the requirements for mass production and has a good market prospect. [Embodiment] Please refer to the first embodiment of the present invention. The zoom lens includes a first lens group of negative refracting power, a second lens group 2 of positive refractive power, and an image lens from the object side to the image side. The third lens group 3 of positive diopter. The lenticular lens group 丨 includes a negative diopter of the light-receiving Wei H), which is fixed at the foremost end of the lens for receiving light. The light-receiving lens 1G is an aspherical lens, i.e., at least - the surface is aspherical. In a specific implementation, the first surface U facing the object side can adopt a slightly convex aspheric surface, and the second surface 12 is opposite to the aspheric surface concave to the object side, so that the zoom lens of the present invention is in a wide angle state. The viewing angle can reach 65. 3 degrees. The second lens group 2 is for changing a lens focal length, and includes a positive refractive power zoom lens 2 〇, the zoom lens 20 is made of a glass material, and the first surface toward the object side is opposite to the other side. Both surfaces 22 are spherical, whereby the tolerance of the entire optical system of the zoom lens of the present invention is greatly improved. For such miniature optical lenses used in camera phones or ultra-short Wei position cameras, the movement of the internal lens is changed: the 疋U degree' has a large tolerance tolerance that the entire lens wire system can be produced. One of the key elements of the game. 1246632 The third lens group 3 is used to compensate for the movement of the image plane 6 caused by the zoom, and to ensure that the position of the image plane 6 is changed, so that the zoom lens can still be focused on the image plane 6 at the fixed position. Get a clear image. The third lens group 3 includes a positive lens 31 and a 贞 lens 32 in order from the object side to the image side, and the positive lens 31 is a molded aspherical lens of the material, which faces the object-side first surface 311 and At least the surface of the second surface 312 opposite the other side is aspherical. Similarly, the negative lens 32 is also a molded aspherical lens of a plastic material. The first surface 321 facing the object side _ and the second surface 322 facing the other side are aspherical to the surface. The focal length of the positive lens & is a positive value to compensate for the amount of back focus change caused by the first lens group 1 and the negative lens at different temperatures, so that the mirror can continue to be good at different temperatures (four) solution image. In addition, the positive lens 31 serves as a compensation for the curvature of field, such as the aspherical characteristics of the positive and negative lenses 3, which can further enhance the optical resolution of the entire lens. In addition, a photon 5 is disposed between the second lens group 2 and the third lens group 3 to control the amount of incident light. A flat butterfly cover is disposed at a position slightly adjacent to the second surface of the second lens group 32 of the third lens group 3. 4 (or IR filter). The first lens assembly and the imaging surface of the zoom lens of the present invention are positioned at the position of the mosquito, and the total length of the copper is adjusted, so that the copper ship is assembled into the component of the hand and the lens is accidentally accidentally exposed during the carrying and using of the mobile phone. Colliding with her risk. By moving the second lens group 2 to change the distance between the first lens group and the first lens group, the image of the imaging surface 6 of the H. _ is the general shooting state shown in the second picture, feeding is the third _ shows nearly 5 £_#_. 1246632 The zoom lens of the present invention uses a small number of lenses and is compact in structure, and adopts an internal zoom mode, the overall length of which can be reduced to 9 mm, and the lens still has sufficient back focus under such a short total length. To this end, the zoom lens of the present invention satisfies the following relationship: · fbw 〇.27 <-<0.35 (a-l)
TT 其中’ fbW係廣角端的後焦長度(Back Focal Length at Wide Angle End) ’ TT是光執迹總長度(Total Optical Track)。當該（a-1)式之 比值偏下限時，易產生後焦不足，會使鏡頭沒有足夠的空間放置紅外 濾鏡（IRFilter)或玻璃蓋板4。而當（a-i)式比值偏上限時，容易 產生入射至成像面的角度過大，導致於有陰影(Shading)現象。 又，在變焦鏡頭總長度超短的情況下，其光學變焦仍可達到將近2 倍。爲此本發變紐_第二透鏡組2與第三透鏡組3之間滿足下 列關係式： Ϊ2 (a-2) 1.7<——<2.9 h 其中，f2係第二透鏡組2之焦距，f3係第三透鏡組3之焦距。當上 述（a-2)式之比值偏下限時，表示第三透鏡組3相對於第二透鏡組2 的放大率小，在過財所__距離相對有所增加。當（a_2) 式之比值偏上限時，代表第三透鏡組3相對於第二透鏡組2的放大率 大，在變焦過程中可能導致像差的增加。 另，爲獲得將近2倍的光學變倉 還滿足下列關係式： 本發明變焦鏡頭在超短的空間裏 !246632TT where 'fbW is the Back Focal Length at Wide Angle End' TT is the Total Optical Track. When the ratio of the formula (a-1) is lower than the lower limit, the back focus is insufficient, and the lens does not have enough space to place the infrared filter (IRFilter) or the glass cover 4. When the ratio of (a-i) is above the upper limit, it is easy to cause the angle incident on the image plane to be too large, resulting in a shadowing phenomenon. Moreover, in the case where the total length of the zoom lens is extremely short, the optical zoom can still be nearly doubled. For this reason, the following relationship is satisfied between the second lens group 2 and the third lens group 3: Ϊ2 (a-2) 1.7 <——<2.9 h where f2 is the second lens group 2 The focal length, f3 is the focal length of the third lens group 3. When the ratio of the above formula (a-2) is lower than the lower limit, it means that the magnification of the third lens group 3 with respect to the second lens group 2 is small, and the distance __ is relatively increased. When the ratio of the equation (a_2) is biased to the upper limit, the magnification of the third lens group 3 with respect to the second lens group 2 is large, which may cause an increase in aberration during zooming. In addition, in order to obtain nearly 2 times the optical binning, the following relationship is also satisfied: The zoom lens of the present invention is in an ultra-short space !246632
Ic (a-3) 0.16<-- <2.2Ic (a-3) 0.16<-- <2.2
TT 其中’ Ic係成像圈之半徑(Radius of an Image Circle)，TT係光 軌迹總長度(Total Optical Track)。當（a-3)式之比值值偏下限時， 表示整光執迹總長度相對過長；當（a-3)式之比值偏上限時，容易產 生畸變量的快速增加及入射至成像面的角度過大。 本發明變焦鏡頭的收光透鏡10及第三透鏡組3的正透鏡31、負透 鏡32均採用非球面，使變焦鏡頭具有較佳的像差矯正。若採用球面鏡 片’則需要有足夠長的空間來設置複合透鏡以矯正變焦時的像差，因 此本發明採用非球面鏡片，可減少鏡頭之鏡片數目並縮減鏡頭總長。 其中’前述收光透鏡1〇及第三透鏡組3的正透鏡31、負透鏡32的非 球面可用下列公式表示： ch2 z=——--—+Ah4+Bh6+Ch8+Dh10 l+[l_(k+l)c2h2]1/2 其中，z爲沿光轴方向在高度爲h的位置以表面頂點作參考距光轴 的位移值；k爲錐度常量；c=l/r，r表示傍軸曲率半徑；A、b、C、D 爲咼階非球面系數。 依據前述本發明之技術内容，可依照下列數值實施例具體實施： 第一數值實施例 表面序號 曲率半徑(mm) (Radius) 厚度/間隔(mm) (Thickness) 折射率 (Μ) 阿貝係數 (Vd) 圓錐度 (Conic) _L. 470.0012 0.5 1.5435 56.8 0 2 --- 2·239547 可變間距1 -1 —_3 ~9.084144 0.8 1.62041 60.3 0 12 1246632 ~----— 4 ---1—— -3.941202 0.1 0 5(光闌） 無窮大 可變間距2 0 6 1.396086 1.4 1.5435 56.8 -1.239444 —- _ 7 ------- —-- _1 -4.89327 0.2 30.82663 —8 -2. 31207 0.45 1.5854 29.1 -1 —9 4. 04246 0.3 23. 45668 10 無窮大 可變間距3 其中： 最大廣角狀態 (Maximum wide-angle state) 最大遠景拍攝狀態 (Maximum telephoto state) 可變間距1 2. 8533 0. 8389 —可變間距2 0.09 0. 7805 —可3 2.471 3. 795 有效焦距 2. 574 4.566 光闌值 __(F. number) 2.9 3. 95 另’非球面係數的具體數值如下表所列： \\^數 --- 表面序^\ A B C D 1 -0.0055125643 〇. 0043866775 -0·00063484141 1. 7949735e-005 2 -0.0068155134 〇. 028801197 -0.010494103 0. 0027183382 6 0.055329246 一〇· 0027846422 0.022726914 〇 7 0.071001703 JJ0493481 0.29233833 〇 9 0·084008727 0.0136511 -0.091784737 0 依據上述第-數值實施例所實施的本發明變焦綱，第—透鏡組（ 之收光透鏡10爲雙面非球面鏡片，變焦透鏡2G爲球面鏡片，第三透 鏡組3的正透鏡31爲雙面非球面鏡片，負透鏡32的第二表面微爲 非球面。前述（a_1)式、（a~2)式及（⑼式之比值分別爲：fbw/TT =〇.28 ’f2/f3 = 2·69，如第四至九圖所示本發明依據第 13 1246632 一數值實施例獲得的變焦鏡頭在不同狀態的球差、像散及橫向色散， 顯示本發明依據第一數值實施例實施的變焦鏡頭具有良好之光學性 能。 本發明變焦鏡頭還可依據以下第二數值實施例具體實施： 第二數值實施例 表面序说 曲率半徑(mm) (Radius) 厚度/間隔(mm) (Thickness) 折射率 (Nd) 阿貝係數 (Vd) 圓錐度 (Conic) 1 223.2092 0.5 1.5435 56.8 8620. 948 2 2. 090871 可變間距1 -1 3 -6. 26885 0.7 1.62041 60.3 0 4 -3. 043807 0.1 0 5(光闌） 無窮大 可變間距2 0 6 1.344059 1.023999 1.5435 56.8 -1.490568 7 -4.400221 0.1500616 17.33977 8 -2. 357824 0.45 1.5854 29.1 -7.413299 9 3. 07069 0.3 16. 27429 10 無窮大 可變間距3 其中： 最大廣角狀態 (Maximum wide-angle state) 最大遠景拍攝狀態 (Maximum telephoto state) 可變間距1 2.976 1.023 可變間距2 0. 07 0.408 可變間距3 2.903 4. 463 有效焦距 2. 544 4. 789 光闌值 (F number) 2.87 4.147 另’非球面係數之具體數值如下表所列： 1246632 1 -0.018512495 0.015452408 -0.0046441965 0.00059242288 2 -0.033706383 0.061844376 -0.030803881 0.0083759309 6 0.054538827 0046012417 -0.002539307 0 7 -0.050886051 0.022390123 0.046666311 0 8 0.024594525 -0.050504128 0.053425899 0 9 0_ 255246 -0.34362515 0.7835933 -1.1537408 依據上述第一數值實施例所實施的本發明變焦鏡頭，第一透鏡組1 之收光透鏡10爲雙面非球面鏡片，變焦透鏡20爲球面鏡片，第三透 鏡組3的正透鏡31及爲負透鏡32均爲雙面非球面鏡片。前述（a-1) 式、（a-2)式及（a-3)式之比值分別爲·· fbW/TT=0.33，f2/f3= 197， Ic/TT = 0· 19。如第十至十五圖所示本發明依據第二數值實施例獲得的 變焦鏡頭在不同狀態的球差、像散及橫向色散，顯示本發明依據第二 數值實施例實施的變焦鏡頭具有良好之光學性能。 綜上所述，本發明確已符合發明專利之要件，爰依法提出專利申 請。惟，以上所述者僅爲本發明之較佳實施方式，舉凡熟習本案技術 之人士援依本發明之精神所作之等效修飾或變化，皆涵蓋於後附之申 清寻刊範圍内。 15 1246632 【圖式簡單說明】 第一圖是本發明變焦鏡頭處於遠景拍攝狀態時之光學剖視圖。 第二圖是本發明變焦鏡頭處於一般拍攝狀態時之光學剖視圖。 第三圖是本發明變焦鏡頭處於廣視角拍攝狀態時之光學剖視圖。 第四圖是依據第一數值實施例實施的變焦鏡頭在廣角端的球差。 第五圖是依據第一數值實施例實施的變焦鏡頭在廣角端的像散。 第六圖是依據第一數值實施例實施的變焦鏡頭在廣角端的橫向色差。 第七圖是依據第一數值實施例實施的變焦鏡頭在遠攝端的球差。 第八圖是依據第一數值實施例實施的變焦鏡頭在遠攝端的像散。 第九圖是依據第一數值實施例實施的變焦鏡頭在遠攝端的橫向色差。 第十圖是依據第二數值實施例實施的變焦鏡頭在廣角端的球差。 第十一圖是依據第二數值實施例實施的變焦鏡頭在廣角端的像散。 第十二圖是依據第二數值實施例實施的變焦鏡頭在廣角端的橫向色 差。 第十三圖是依據第二數值實施例實施的變焦鏡頭在遠攝端的球差。 第十四圖是依據第二數值實施例實施的變焦鏡頭在遠攝端的像散。 第十五圖是依據第二數值實施例實施的變焦鏡頭在遠攝端的横向色 差。 16 1246632 【主要元件符號說明】 第一透鏡組 1 收光透鏡 10 第一表面 11 第二表面 12 第二透鏡組 2 變焦透鏡 20 第一表面 21 第二表面 22 第三透鏡組 3 正透鏡 31 第一表面 311 第二表面 312 負透鏡 32 第一表面 321 第二表面 322 玻璃蓋板 4 光闌 5 成像面 6 17TT where 'Ic is the Radius of an Image Circle, TT is the Total Optical Track. When the ratio of the ratio of (a-3) is lower than the lower limit, it means that the total length of the twilight trace is relatively long; when the ratio of the formula (a-3) is upper limit, it is easy to produce a rapid increase of the distortion and incidence on the image plane. The angle is too large. The positive lens 31 and the negative lens 32 of the light-receiving lens 10 and the third lens group 3 of the zoom lens of the present invention all adopt an aspherical surface, so that the zoom lens has better aberration correction. If a spherical lens is used, it is necessary to have a sufficiently long space to set the composite lens to correct the aberration at the time of zooming. Therefore, the present invention uses an aspherical lens to reduce the number of lenses of the lens and reduce the total length of the lens. The aspherical surface of the positive lens 31 and the negative lens 32 of the aforementioned light-receiving lens 1〇 and the third lens group 3 can be expressed by the following formula: ch2 z=——---+Ah4+Bh6+Ch8+Dh10 l+[l_( k+l)c2h2]1/2 where z is the displacement value of the surface apex as the reference optical axis along the optical axis at the height h; k is the taper constant; c=l/r, r is the 傍 axis Curvature radius; A, b, C, D are the aspherical aspheric coefficients. According to the foregoing technical content of the present invention, it can be embodied in accordance with the following numerical examples: First Numerical Embodiment Surface No. Curvature Radius (mm) (Radius) Thickness/Interval (mm) (Thickness) Refractive Index (Μ) Abbe Coefficient ( Vd) Cone (Conic) _L. 470.0012 0.5 1.5435 56.8 0 2 --- 2·239547 Variable spacing 1 -1 —_3 ~ 9.084144 0.8 1.62041 60.3 0 12 1246632 ~----- 4 ---1 -3.941202 0.1 0 5 (optical) Infinite variable spacing 2 0 6 1.396086 1.4 1.5435 56.8 -1.239444 —- _ 7 —------ — — _1 —4.89327 0.2 30.82663 —8 —2. 31207 0.45 1.5854 29.1 -1 —9 4. 04246 0.3 23. 45668 10 Infinite variable pitch 3 where: Maximum wide-angle state Maximum telephoto state Variable pitch 1 2. 8533 0. 8389 — Variable pitch 2 0.09 0. 7805 — can be 3 2.471 3. 795 Effective focal length 2. 574 4.566 Optical value __(F. number) 2.9 3. 95 The specific values of the 'aspheric coefficient are listed in the following table: \\^ Number --- Surface Order ^\ ABCD 1 -0.0055125643 〇. 0043866775 -0·00063484141 1. 7949735e-005 2 -0.0068155134 〇. 028801197 -0.010494103 0. 0027183382 6 0.055329246 〇 · 0027846422 0.022726914 〇7 0.071001703 JJ0493481 0.29233833 〇9 0·084008727 0.0136511 -0.091784737 0 The zoom of the present invention implemented according to the above-described first numerical embodiment The lens-receiving lens 10 is a double-sided aspherical lens, the zoom lens 2G is a spherical lens, the positive lens 31 of the third lens group 3 is a double-sided aspherical lens, and the second surface of the negative lens 32 is microscopic. It is aspherical. The ratios of the above formulas (a_1), (a~2), and ((9) are: fbw/TT = 〇.28 'f2/f3 = 2·69, as shown in the fourth to ninth drawings. 1246632 A spherical lens obtained by a numerical embodiment in different states of spherical aberration, astigmatism and lateral dispersion, showing that the zoom lens according to the first numerical embodiment of the present invention has good optical performance. The zoom lens of the present invention can also be based on the following Two numerical examples are embodied: Second numerical embodiment Surface sequence radius of curvature (mm) (Radius) Thickness/space (mm) (Thickness) Refractive index (Nd) Abbe's coefficient (Vd) Cone (Conic) 1 223.2092 0.5 1.5435 56.8 8620. 948 2 2. 090871 Variable pitch 1 -1 3 -6. 26885 0.7 1.62041 60.3 0 4 -3. 043807 0.1 0 5 (optical) Infinite variable spacing 2 0 6 1.344059 1.023999 1.5435 56.8 -1.490568 7 -4.400221 0.1500616 17.33977 8 -2. 357824 0.45 1.5854 29.1 -7.413299 9 3. 07069 0.3 16. 27429 10 Infinite variable spacing 3 where: Maximum wide-angle state Maximum telephoto state (Maximum telephoto state)Variable pitch 1 2.976 1.023 Variable pitch 2 0. 07 0.408 Variable pitch 3 2.903 4. 463 Effective focal length 2. 544 4. 789 Optical value (F number) 2.87 4.147 The specific values of the 'aspherical coefficient are as follows Column: 1246632 1 -0.018512495 0.015452408 -0.0046441965 0.00059242288 2 -0.033706383 0.061844376 -0.030803881 0.0083759309 6 0.054538827 0046012417 -0.002539307 0 7 -0.050886051 0.022390123 0.046666311 0 8 0.024594525 -0.050504128 0.053425899 0 9 0_ 255246 -0.34362515 0.7835933 -1.1537408 According to the first numerical embodiment described above In the zoom lens of the present invention, the light-receiving lens 10 of the first lens group 1 is a double-sided aspherical lens, the zoom lens 20 is a spherical lens, and the positive lens 31 of the third lens group 3 and the negative lens 32 are both sides. Aspherical lenses. The ratios of the above formulas (a-1), (a-2) and (a-3) are respectively ·· fbW/TT=0.33, f2/f3=197, Ic/TT = 0·19. As shown in the tenth to fifteenth drawings, the zoom lens, the astigmatism, and the lateral dispersion of the zoom lens obtained in the second numerical embodiment according to the second numerical embodiment show that the zoom lens according to the second numerical embodiment of the present invention has a good performance. Optical performance. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art to the spirit of the present invention are included in the scope of the appended claims. 15 1246632 [Simple description of the drawings] The first figure is an optical cross-sectional view of the zoom lens of the present invention in a distant shooting state. The second figure is an optical cross-sectional view of the zoom lens of the present invention in a general shooting state. The third figure is an optical cross-sectional view of the zoom lens of the present invention in a wide viewing angle state. The fourth figure is the spherical aberration of the zoom lens implemented at the wide angle end according to the first numerical embodiment. The fifth figure is the astigmatism of the zoom lens implemented at the wide angle end according to the first numerical embodiment. The sixth figure is the lateral chromatic aberration of the zoom lens implemented at the wide angle end according to the first numerical embodiment. The seventh figure is the spherical aberration at the telephoto end of the zoom lens implemented in accordance with the first numerical embodiment. The eighth figure is the astigmatism of the zoom lens according to the first numerical embodiment at the telephoto end. The ninth diagram is the lateral chromatic aberration of the zoom lens according to the first numerical embodiment at the telephoto end. The tenth graph is the spherical aberration at the wide-angle end of the zoom lens implemented in accordance with the second numerical embodiment. The eleventh diagram is the astigmatism of the zoom lens according to the second numerical embodiment at the wide angle end. Fig. 12 is a lateral chromatic aberration of the zoom lens according to the second numerical embodiment at the wide angle end. The thirteenth diagram is the spherical aberration of the zoom lens according to the second numerical embodiment at the telephoto end. The fourteenth diagram is the astigmatism of the zoom lens according to the second numerical embodiment at the telephoto end. The fifteenth diagram is a lateral chromatic aberration of the zoom lens according to the second numerical embodiment at the telephoto end. 16 1246632 [Description of main component symbols] First lens group 1 Light-receiving lens 10 First surface 11 Second surface 12 Second lens group 2 Zoom lens 20 First surface 21 Second surface 22 Third lens group 3 Positive lens 31 One surface 311 second surface 312 negative lens 32 first surface 321 second surface 322 glass cover 4 aperture 5 imaging surface 6 17